Summary of Significant Accounting Policies - Schedule of Net Income (Loss) Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Numerator:
Income from continuing operations					$ (1,603)	$ 10,988	$ 10,846	$ (1,667)	$ 16,954	$ 18,564	$ 15,588
Income (loss) from discontinued operations, net of tax					74	19	112	0	0	205	(361)
Net income	$ (1,336)	$ 9,768	$ 9,847	$ (1,325)	$ (1,529)	$ 11,007	$ 10,958	$ (1,667)	$ 16,954	$ 18,769	$ 15,227
Denominator:
Weighted average shares outstanding for basic income per common share									9,326	9,389	9,562
Effect of dilutive stock options (in shares)									84	47	6
Adjusted weighted average shares outstanding for diluted income per common share									9,410	9,436	9,568
Basic:
Continuing operations (in dollars per share)					$ (0.17)	$ 1.18	$ 1.15	$ (0.18)	$ 1.82	$ 1.98	$ 1.63
Discontinued operations (in dollars per share)					$ 0.01	$ 0.00	$ 0.01	$ 0.00	$ 0.00	$ 0.02	$ (0.04)
Total (in dollars per share)	$ (0.14)	$ 1.05	$ 1.06	$ (0.14)	$ (0.16)	$ 1.18	$ 1.16	$ (0.18)	$ 1.82	$ 2.00	$ 1.59
Diluted:
Continuing operations (in dollars per share)					$ (0.17)	$ 1.18	$ 1.14	$ (0.18)	$ 1.80	$ 1.97	$ 1.63
Discontinued operations (in dollars per share)					$ 0.01	$ 0.00	$ 0.01	$ 0.00	$ 0.00	$ 0.02	$ (0.04)
Total (in dollars per share)	$ (0.14)	$ 1.04	$ 1.05	$ (0.14)	$ (0.16)	$ 1.18	$ 1.16	$ (0.18)	$ 1.80	$ 1.99	$ 1.59